AEM Workflows let you automate a series of steps that are performed on (one or more) pages and/or assets.
For example, when publishing, an editor has to review the content - before a site administrator activates the page. A workflow that automates this example notifies each participant when it is time to perform their required work:
The author applies the workflow to the page.
The editor receives a work item that indicates that they are required to review the page content. When finished, they indicate that their work item is complete.
The site administrator then receives a work item that requests the activation of the page. When finished, they indicate that their work item is complete.
Content authors apply workflows to pages as well as participate in workflows.
The workflows that you use are specific to the business processes of your organization.